Portable power supply



FIG. 1 is a top, front, left perspective view of a portable powersupply, showing our design.

FIG. 2 is a front elevation view thereof.

FIG. 3 is a rear elevation view thereof.

FIG. 4 is a left side elevation view thereof.

FIG. 5 is a right side elevation view thereof.

FIG. 6 is a top plan view thereof.

FIG. 7 is a bottom plan view thereof; and,

FIG. 8 is a perspective view of the portable power supply with thehandle in an unfolded position.

The broken lines shown in the drawings are for the purpose ofillustrating portions of the portable power supply that form no part ofthe claimed design.

CLAIM The ornamental design for a portable power supply, as shown anddescribed.